Rice-hulling machine.



I l Zai/#Wil F. G. DIETERIGH.

RIUE HULLING MACHINE.

APPLICATION FILED APR. 17, 190s.

Patented Feb. 16, 1909.

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F. G. DIBTBRIGH. RICE HULLIG MACHINE. A

APPLICATION FILED 1211.17, 1908. f 91,449, Patentedf'b. 16, 1909.

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Fred G. 111266711670 TMm/mns.

F. G. DIETERIGH.

RIOB HULLING MAGHINE.

APPLICATION FILED IPR411908.-

Patented Feb. 16, 1909.

4 SHEETS-'SHEET 4.

WITNESSES:

and-effectin a partial scourin huller,v thatl the TED STATES PATENT oEEicE. I

No. eifie'.

ABe it lgnown'that I, FRED G. DIETERrcii, residmg m the city of Washington, District of Columb1a,.haveinvented a new and Imroved Rice-Hulling Machine, ofl which the ollowing is a specification.

My present invention generally seeks to rovide certain improvements in machines for removing the hulls, cuticle and gummy coatings' from rice,'coee and other grains or berries, and it moreparticularly relates to that type of'machine, disclosedin my Patent No. 770,226, patented Se tember 13, 1904 and in my co-pending aplp ication filed Feb..

13, 1905, No,'245456, W ich generally comprehend an externallyribbed cylinder for coperatmg with an op osing abrading surface o r huller blade, projected inte the casing 1n which the cylinder is mounted, and which has a feed inlet at one end and a discharge at the other end.

In constructing rice mills for large ca acl ity, it isusual to provide a series of hu ers ofthe type v`referred to, six or eight being generally used, through which .the rice is consecutively fed, so as to receive the de- 'sired preliminary separations` of the' bean from' the Q hulls and cuticle and the good beans -from the im erfect, smooth and broken beans, before t e hulled and'scoured productf'passes off to the final olishing and 'lading-means. From practicsil experiment,

have found that in transferring the artially scoured or hu'llcd rice grains throug 'the series of'huliers, which is usually done by connectmga'long wooden spout to the discharge of onehuller andthe inletfend of the next y lgrains become chilled to such an extent,`t at as they' pass into the next huller, a considerable energy of the said next huller must be exerted to 'bring the par-- tially hulled andscoured rains up to that degree'of heat that lethe'y ad -priorv t'ofdischarging from the first` or preceding'huller and in a condition'most desirable, smce the best'results of huller-s of the kind referred to is obtained after-the rice ,grain bulk coni tained therein has been thoroughly heated` by abrasion, such condition being practically necessary to admit'ofremoving the cuticle the obtainof Vthe esired -hulling' an scouring resu ts 1n the larger .mills be obtained only by passing the riee vthi-'oiligl hullers, and it should be` stated .that in the" smaller or plantation millswhe'rebut' asin-` speciiieaon of Letters Patent. pplicatioii led April 17, 1906. Serial No. 427,727'.

a number of v FRED G. DIETERICH, OF WASHINGTON,l DISTRICT OF COLUMBIA.

RIGE-H'U'LLINGy MACHINE Patented Feb. 16, 1909.

gle .huller is used,the rice must be passed through the huller a number of times, theA huller blade being adjusted to eifect-the'desired separations and preliminary scouring. Another and serious objection in the Ause of-`hullers of the type stated is the expense incident in the equipment of six or eight and' sometimes more in a sin le mill, since each huller must be separately mounted, belted and adjusted.

Primarily, my present invention seeks to rovide an improved construction of rice ulling or scouring means in which the cost of equipment of a mill is materially reduced, and in which during the action of a plurality of ribbed cylinders and coacting hullinu' blades the grain is maintainedl at its desired heated condition while passing from one lhulling cylinder to'another.

My present invention, in its generic nature, therefore comprehends the combining of a plurality, preferably two ribbed cylinders `and cooperating abrading surfaces, within a single casing, providing as it were, a single machine in which the rice receives a continuous,

and two distinct, but successive hulling and scouring operations, and in Whichthe parts are operated from a single drive belt.

Again, my present invention embodies a twin cylinder hulling machine, in which the rice is fed into the casing at one end thereof, subjected to the action of one hulling cylinder as it passes forward and under the action ofanother hulling cylinder as it passes backward to a discharge located at the inlet end of the casing, independently adjustable hullf blades being cooperatively combined with t e two cylinders. Y In its more specific nature, this invention consists in certain details of constructipn and combination of parts, all` of which will'be' hereinafter full explained, pointed out in the appended c aims and illustrated' in the accompanying drawings, in which: I

VFigure 1, is a perspective view of my invention showing the same arranged-as a twin c' linder .rice hulling machine.'

anfview of m' improved construction of uller. Fig. 3, is'a transverse sectionof'tli'e of the uller--casmg with thet'wo cooperating cylinders Vand the blades, the direction ofmovement of the ricel through the complete' machine indicated byfarrows; Fig. 5, is a detail per-V ',105 machine shown in Fig. 1,- taken substantially on the line 3-3 oli-Fig. 2.' Fi 4, is a plan view of the lower part with t e hulling blades.

. y same. can be readily utilized for hullin i v pective view of one of the, hulling cylindersective view of the adevices'that coperate Fig. 7, is a detail view of one end of the pair of huller blades.

ig. 6, is a detailpers justin and lock-ing Fig. 8, isa view of one ofthe cylinder collars' l tends transversely of the machine, 1s downhereinafter specified.

While my, present invention is more particularly intended for use in rice mills and in describing the same I shall oint out its advantages as more -especia y applicable in hulling rice grains, I desire it understood that without changing the generic features the cleaning and separating coffee hulls, as l hereinafter more fully appear.

Referring now more particularl to Figs.

` 1, 2 and 3, the casing comprises a ower secsame as shown in my tion 1 and an upper section 2, the latter being hingedto the lower section to swin back the aten't 'be ore mentioned, the front ed es o 'the two casing'sections having fiat anges, with which the hinged yoke clamps 3 and' clamp screws 35 coact, as shown 1n the drawings. In the present arrangement of the two part casing .the lower section is formed with two longitudinal compartments 13a-1b, each of which constitutes a hulling casing, the opposite ends of each of which has the semi-*circular sockets 08 and the axially extended half beartions 20-20a the casing 2 has a flatclamping formsl the bearing for'the huller blades. i

portion 20b that opposes a flat bearing ortlon 1c of the lower casing member w ich my present construction, the two hulling casings and cylinders are disposed indifferent horizontal planes, the first casing and cylinder, which shall hereinafter termthe receiving casing and cylinder bein uppermost, the

reason for which will present y appear. Each of the-hulling casings includes a screen bot tom 22 of the usual semi-circulai'shape, de-

' tachably held to its operative position by saddle or yoke irons 23 and the bridge members/constructed and detachably mounted l on the bed frame the same as shown in my other application referred to and clearly une l" derstood from Fig. 3 of the present drawin s,y

from which it will be seen the ends of t e screen bottoms engage the shoulder like bearings 25-25 of the bed frame, to which they.

are held by the steel clamp plates-26-26. The upper lor receiving huller casing has the usual infeed opening at one end, with a choking gate h, the hopper In f prlovided being mounted over the said openingV as shown.

The opposite-end of the uplperlca'sing has the usual outlet O, also provi edv with achoking gate or valve 0,', which discharges into 'a metal 'duct 217, formed'as an integral part of the uppercasing casting. This duct exhulling casin 1s regulated to suit the adjust-l ments provi ed forpregulating the. capacity of the lower discharging hulling cyhnder and casing. .l

At this point it .should be stated in prac' tice the grain becomes very hot by reason of its constant rubbing aglainst the hulling `means and the cylinder, t 4e metal parts likewise becoming heated, and by reason thereof the feed duct 27, which is an integral part of the casing is likewise heated and .thus prevents the primary or first rocess hulled and scoured rains from1c ing or becoming appreciab y cooled in passing from the upper to the lower hulling means, such handling of the material being treated, greatly increasing the capacit of the machine, since little or no energy of t 1e second or lower hulling means is necessary to restore the primarily hulled 'and scoured grain to its deslred-heated condition for further effective hulling and scouring, as is necessary ,in the common methods' now employed, since the necessity of passing ythe gram throu h long wooden spouts or ducts from one ulling machine to another.

-inlet of theother cylinder casing is of'metal rain as V1t passes intofthe second cylinder an vcasing is and constantly kept hot, the

substantially in condition to be acted on with the same results of scourin that it received inthe discharge end o the other cylinder.- l

' The hulling cylinders -80-80, one of which is shown in detail in Fig.5, each are of a length slightly in excess of the length ofthe cylinder casings, as clearly shown in Fig. 4, whereby thesaid ends project 'into the ,circular seats or ockets 284-28 in the casing ends,"and the ri s ofthe said 'cylinders stoIT short of the ends thereof, whereby to allow for the reception of the end collars 29-'-29f*/4 that are slipped onto the smooth ends of the cylinders andare 'made fast therein so they turn with the c linders. v com rise the in eed end ones 30"tha`t begin at t e collar at the said end and extend diagonally and transversely forwardly whereby-'todirect the infed gram quickly forward ,and ina'spiral direction'along the casing so The cylinder ribs as tofiinparrtrproper; start or fnrwai'vdtravels. slowly forwardlyr-as it is being rapmovement to'.- the grainr -The infeedf ribs that extend along but. a short distance. of the length of thecyelinder proj ect b'etween'the ends ofjafpair-'ojt long longitudinally and par? allellye-disposed ribsO-Ywitli-whichzcoact Vthe similar but shorter longitudinal ribs, the said -long-ribsformingasit were, the main hullingribs, since from the Vinfeed end-to the discharge end` of.' -thesaid-z ribs. the .rice bulk to. form the scoopor lifta()b of. the cylinder; .tor carrying` the grain at-'thecorresppnding head. oif'the casing'toward the. disc arging outlet` O, .the Saidlifts endin against'. the collar 29'?, the said collar, asa so` -the collar '29 atirthe. other. end ositively preventin g: any

of,v thezgrainscrow ingbetween the. ends. of

i.. the cylindersy and.: the casing heads.

' -Cofactinggwith each. cylinder isahulli-ng blade Sir-3L, andthese blades, as is. best showniinfligsr and#l 4, are mounted. on.. the fiati hearing pol-'tionl lv-cfofthe lower half of the duplexcasing casting. or-` frame that forms,

assit were, thebridge .between the twolower- .lia-liIk section. ciylinder. compartments and Whichopposet e. like formed i'lat bridge-or clampingI portion 2.0" of" thel upper. `,casing at blades spectto the axes of the hullingcylinders. By

' arranging the hulling blades in the manner shown, .they can be readilyprojected into.

their respective casings so-as. to .coact with the cylinder ribs onthe up going side ofthe 4:0Y

cylinders. and further, two blades will: be-

adjacently so disposed that the adju'stin l means therefor and presently aainreferre 4fto, can be conveniently manipu ated.

The upper casing member 2 ishinge@ at .the -uppe'ror rear edge at the opposite ends,

1 See.33, tothe ears 33a 'of the lower casingsect'on, as clearly shown in Fig. 2 and the front dSQffLtheupper and lower. casing section haye'iiat o posing-bearing flanges Blk- 34" that exten thefull-lengthof, the casing, and with which the L11-shaped yoke clamps coact,

i' "saidgclamps each comprising a-yoke shaped member 35., hinged 'at the upper end to the L- ..up'per front flange 34 vand having a set screw 6,5l 1; as 'clearly shown inF-ig; 3., the said clamping devices bei 'Asame'as the similar devices in my patent and `co ending applicationbefore referred to.v

jor -conveniently" adjusting the huller 35,*'- for engaging thefother orlower flange 34,

arranged substantiallyl the -`.-.blades as well as providing them with suf- .ficient bearing to withstand the back' ressure thereon duringthe operation of hu ling adjustln'g. theges thereo into and also forl interchangeabl same to bringthe opposite e opposite ends .of the huller'blades have diag'` onally disposed elongated slots 37-37l and -these slotsv are so-inclined withrespect to the bladesand to each other, that the said blades may be readily reversed, vor changed. from end to endto acquire the maximum use voi theabrading surfaces thereof.

each -a pair of inwardly projected bosses 41 in each. of which. is mounted an adjusting screwv 42 thatcarries a handle wheel., 42a, at the outer end, and vhas a. saddle piece 42b mounted on the inner end that has a stout pendent lug43. The s'addles,'with the lugs Aare adjusted inopposite directions in the longitudinal plane of the machine by properly adjusting the screws. 42-42, and thus if' the said screws arev turned inwardly or home, the saddles. 42b are likewise moved inwardly and when the screws are turnedin the -other direction the saddle members 42b are moved longitudinally outwardly, thus providing as it were, for the reciprocable movement of the studs. 43. Near the threaded bosses 41, the flat or clamping art 20 of the upper casing section has two ongitudinally extendedparall'el slots 44 through which the pendent lugs prpject and the opposingfiat ortion 1c of the lower casing casting has ongitudinal-recesses or grooves in the upper face that register with the slots 44, and onto which the lower ends of the lugs 43 project. o providing the recesses 45` disposed in the ongitudinal'plane that is par lel with theslots in the upper casing portlon, the pend- -ent lugs 43 form stout bearings for taking u backlash or strain on the huller blade and t rereby relieve the threaded bolts and saddles from a torsional twist orstrain andprovide for a solid' back bearing?, for the blades, each ofwhich hasa diagonal slot 37-37a in The ends or headsofthe casing frame have the opposite ends through.. which pass the lower end of the screw lugs 43, it being manifest that as the slots in the huller blade ends are diagonally disposed with respect tothe slots in theupper and lower casing members, it follows the huller blades will ybe vmoved transversely inwardly or outward by simply mani ulating the screw bolts andin such Y manner -t at one huller blade, the lower one, for example, may be adjusted u closer to its co-actlngl cylinder than the ot 1er, whereby a moreperfecthulling'ofthe yprimarily hulled or.- scoured rice that passes from the duperhullercasing iseifected. Again, the

angle with respect to their hulling cylinders by shifting the screw at one end, more than the screw at the. other end.

Each cylinder shaft carries a fly wheel'50, and..a.belt pulley 51', and about the two belt er1 blades maybe readily set on a slight wheels is passedV a single drive belt 52 that takes around thepulleys 51 in such manner that they turn toward each other, it being further manifest that by arranging the blades and the cylinders and the casings as described, the lower or inner cylinder may be provided with a belt wheel of slightly less diameter than the belt wheel of the other cylinder and since both cylinders are driven by the single endless belt, the cylinders will be caused to revolve away from each other and at different speeds.

1t will be noticed that in the resent construction of my im roved rice hu er, a double acting or twin cylinder huller is provided in which the casing mount can be provided at' but a slight cost over the cost of manufacture of the single cylinder huller disclosed in my coending application, heretofore s ecified.

y disposing the two cylindersin ifferent horizontal planes with the receiving one the highest, it follows that .a positive discharge of the partially scoured or hulled-material from the up er to the lower cylinder is effected and W ich may be Aalso greatly facili- Vtated b having the lower cyhnder revolve terial' modification of the parts, can be adapted Afor hulling larger rains such as coffee, and furthermore, whi e for commercial use the twin cylinder form of my invention as shown and' described is a preferred construction, it is manifest that a greater number of cylinders and compartments on a single casing mount may be pro- -vided for without departingfrom my present invention or the scope of the appended claims. l

Having thus describedmy invention, what 1. Ai' hullin machine comprisin a bed portion forme with a plurality of ongitudinal parallel compartments, each having a screened bottom, the said compartments being disposed in an inclined plane,a hulling cylinder mounted in each compartment, means forimparting reverse rotary motion to each adjacent pair of cylinders, a single casing section that fits over the bed portion and is provided with longitudinal compartments, one in each of the compartments in the bed portion for receiving the upper portions of the c linders, huller blades for coacting with th tween the bed ortion and the top casing section, the sai top casing section having.

e several cylinders held be' of the adjacent compartment, and havlng a compartment and a discharge for the-f last or lowermost compartment.

' 2. In combinatiom'a two part casing having a pair of horizontally disposed lon itudinal parallel compartments, one in a p ane below the other and Yeach having an inlet at one end and a discharge at the other end, an inclosed by-pass thatconnects the outlet of one compartment with the inlet ofthe other compartment and independently adjustable hullin blades for each compartment, the said blades bein located between the yad'acent faces of t e cylinder and clam e between the two parts of the casing, a hu ing cylinder for each compartment having ribs for feeding the `material from the infeed -tto the dischar es and other means for -revolving the cylin er in reverse directions.

'3. -The combination with the single casing,

having two independent hulling compartments and having an upper and a lower'section, the upper section eing hinged to the -feed inletfor the first or uppermost hulllng lower? section, the yupper hinged section hav` 'ing an inlet and an outlet for each com artment, the first inlet and second outlet eing at one end ofthe casing and the other outlet and inletbeing a covered by-pass from one com artment to the other, means for clamping t e two sections together, a pair of inde- Y- pendent huller blades held between the two compartments, a ribbed hulliug cylinder in each compartment for coperating with the hulling blades, the ribsof one cylinder being reversely disposed with respectto the other cylinder, volving the two cy tions.

4. The combinationwith a casing, having a pair of parallel but independent hulling compartments, said casing comprising a lower xed member having a bearing bridge lengthwise betweenthe two compartments, an upper hin ed member having a bearing portion for c osing down onto the bridge portion of the other casin section, 'a pair of inde endently adjustab e huller blades mounted tionsv ofthe casing sections that extend into their respective com artments, and a cylinder mounted in eac casing compartment,-

a sin le driving means for reders in opposite direceach having a belt pulley, and having hulling ribs for coperating with their respective 'huller blades, the ribs being arranged to feed the materiali forwardly, the ribs on one cylinder acting to feed the material inI a direction reverse; .to the feed of the other cylinders, the two hulling compartments being joined at one end by a cross over asbetween the opposing bearing por# y sage, one compartment having an infee atone end, the other compartment at the corV responding end having anoutlet, and a single that register with t 40 'lower sections to project one 5. The combination with the lower and the l 5 upper sections ofthe casing, the hulling compartment formed thereby when closed, and 4the hulling cylinder mounted in the said compartment, the lower casing section having recesses, the u per sections -having slots le recesses, the latter 'and the slotsbeing parallel with the axes of the cylinder, the u per casing having threaded bosses; of a huller blade Vmovably mounted between the upper and lower casin sections,

l5 and to project at one edge to the hu ing compartment, said blade having a diagonal slot,

" in each end, a yoke for each end of the blade,

each yoke having a pendent lug that extends through the slots in the upper casing section 20 and the blade and into the recess in the lower casing section and a-screw bolt mounted in each of the threaded bosses, of the u per casing section that carries the blade adjusting yokes.

6. In a machine of the character described, the combination with a air of ,coperating hulling chambers and cy inders; of a pair of independent huller blades, mounted between the two cylinders for coperating therewith and means mounted on the opposite ends of the .upper casing section, .connected with the opposite ends of the blades for independentlyadjusting the said blades, as set forth.

7. In a machine of the character described,

the combination with a casing composed of an upper and a lower section, and having a hulling com artment, a rotary ribbedcyline der mounte in the said com artment, of a huller blade held lbetween t e upper and edge to coact lwith the cylinder ribs, sae'd blade having a dlagonally disposed slotin each-end, a yoke for each'end of the cylinder, a screw adjustf ing means for each yoke that moves the yoke (in a plane parallel'with the axis of the cylinder, said yokes each having a pendent lug that extends into the diagonal slots in the huller blade.

8. A means for hulling grains of ricefcoffee or thelike, comprising a single casing structure having a pair of coperatin hull-ing chambers and cylinders, the cylin ers being relatively arranged to feed the material in opposite directions, the hulling chambers being connected so that one receives the stock as itV dischar es from the other, a pair of independent hulling blades mounted between the adjacent faces ofthe two cylinders, and means on the casing connected with the hulling blades for independently adjusting the blades.

9; The combination of the" single casing comprising a lower section and an upper section hinged thereto and disposed at an incline, said casing having two parallel compartments an upper and a lower, the upper com artment having an infeed at one end,

the ower compartment having -a discharge two com'dpartments, and means mounted on each en of the casing that co erate with the bladesfor adjusting the sai blades. FRED G. DIETERICH. Witnesses:

ELEANOR MAcCoRMIcK,

ANITA C. DnrrEmcH.-A 

